Frank, I was referring to the small, single-pistol type safes, not to actual gun cabinets which can be bolted down.

That's what I was referring to as well. We have several, and they have holes in the bottoms for bolting down.

They look like this:

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"It is long been a principle of ours that one is no more armed because he has possession of a firearm than he is a musician because he owns a piano. There is no point in having a gun if you are not capable of using it skillfully." -- Jeff Cooper